Issue |
Europhys. Lett.
Volume 41, Number 2, January II 1998
|
|
---|---|---|
Page(s) | 141 - 146 | |
Section | Atomic, molecular and optical physics | |
DOI | https://doi.org/10.1209/epl/i1998-00122-9 | |
Published online | 01 September 2002 |
A continuous beam of slow, cold cesium atoms magnetically extracted from a 2D magneto-optical trap
Observatoire Cantonal, Rue de l'Observatoire 58, CH-2000
Neuchâtel, Switzerland
Received:
5
June
1997
Accepted:
27
November
1997
Starting from a 2D magneto-optical trap where cesium atoms
are permanently subjected to 3D sub-Doppler cooling and 2D magneto-optical
trapping, we have produced a beam of cold atoms continuously extracted along
the trap axis. The simplest extraction mechanism,
presently used, is the drift velocity induced by a constant magnetic field.
We have used this continuous beam of atoms to produce Ramsey fringes in a
microwave cavity as a first
demonstration of an atomic resonator operating continuously with laser
cooled atoms. The shape of the resonance pattern allows an estimate of
the axial temperature, typically K. The average velocity can be
adjusted from 0.7 to 3 m/s; the trap-to-atomic-beam conversion
efficiency is close to one.
PACS: 32.80.Pj – Optical cooling of atoms; trapping / 42.50.Vk – Mechanical effects of light on atoms, molecules, electrons, and ions
© EDP Sciences, 1998
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